AtlasPinViewFactory.h

// Copyright eeGeo Ltd (2012-2014), All Rights Reserved

#pragma once

#include "Types.h"
#include "IPinViewFactory.h"
#include "LayerIds.h"
#include "Pin.h"
#include "Bounds.h"
#include "PinView.h"
#include "AtlasTexturePageLayout.h"
#include "MathFunc.h"

namespace Eegeo
{
    namespace Pins
    {

        class AtlasPinViewFactory : protected Eegeo::NonCopyable, public IPinViewFactory
        {
        public:
            AtlasPinViewFactory(const Rendering::AtlasTexturePageLayout& pageLayout)
            : m_pageLayout(pageLayout)
            {
                
            }
            
            PinView* CreateViewForPin(Pin& pinModel)
            {
                const Geometry::Bounds2D& uvBounds = m_pageLayout.GetTileUVBounds(pinModel.GetCategoryId());
                float width=Math::Abs(uvBounds.max.x-uvBounds.min.x)*m_pageLayout.GetPageWidth();
                float height=Math::Abs(uvBounds.max.y-uvBounds.min.y)*m_pageLayout.GetPageHeight();
                v3 vertices[3];
                
                vertices[0].x = -width/2.0f;
                vertices[0].y = 0;
                vertices[0].z = 0;
                
                vertices[1].x = -width/2.0f;
                vertices[1].y = height;
                vertices[1].z = 0;
                
                vertices[2].x = width/2.0f;
                vertices[2].y = height;
                vertices[2].z = 0;
                
                Geometry::Bounds3D modelBounds = Geometry::Bounds3D::Degenerate();
                modelBounds.Encapsulate(vertices[0]);
                modelBounds.Encapsulate(vertices[1]);
                modelBounds.Encapsulate(vertices[2]);
                
                return Eegeo_NEW(PinView)(pinModel, modelBounds);
            }
            
        private:
            const Rendering::AtlasTexturePageLayout& m_pageLayout;
        };
    }
}